There is an urban legend which has been around for many years to the effect that a professor teaching physics in a major university explained that it was feasible that, just by pure chance, the trajectory of the Brownian motion vibrating every water molecule in a cup might be "up," causing it all to evaporate in the twinkling of an eye.
"But," the professor is supposed to have said, "That's about as likely as this quarter landing on its edge and staying in that position when I throw it." And he supposedly threw the quarter across the amphitheatre - style classroom, and it landed on the floor on its edge and stayed there, upright.
Once many years ago, maybe around 1970, when I was alone in my parents' house in Philadelphia, I was thinking of the story, and on a lark threw a nickel across the room.
The nickel flew about 10 feet, landed on its edge on the linoleum floor -- and stayed there, upright.
I swear that that is a true story.